Relay protection setting value checking method based on digital dynamic simulation technology

Abstract

The invention discloses a relay protection constant value checking method based on a digital dynamic simulation technology. The method comprises the following steps of: acquiring external power grid system parameters, power plant primary equipment parameters, excitation system parameters and auxiliary power relay protection constant values; building a power system simulation model by using the external power grid system parameters, the power plant primary equipment parameters, the excitation system parameters and the auxiliary power relay protection constant values; and performing fault simulation by using the power system simulation model, and judging whether the auxiliary power relay protection constant values are correct or not according to a protection action. According to the method, the correctness of the auxiliary power relay protection constant values can be verified in advance, and the occurrence probability of relay protection misoperation is reduced.

Description

technical field [0001] The invention relates to the field of electric power engineering. More specifically, the present invention relates to a method for checking the fixed value of relay protection based on digital dynamic simulation technology. Background technique [0002] The setting value of the relay protection device is usually calculated and reviewed according to the setting calculation guidelines, specifications, countermeasures, etc., and put into operation after setting in the protection device. Whether the calculation result of the setting value is correct, whether the settings of the control word and tripping matrix are in line with the site There is no way to verify whether the reality and the fixed value range match. The level of protection setting and calculation personnel is uneven, and there are deviations in the understanding of guidelines, specifications and countermeasures. The calculation of different setting calculation principles is quite different, ...

AI Technical Summary

Problems solved by technology

The level of protection setting and calculation personnel is uneven, and there are deviations in the understanding of guidelines, specifications and countermeasures. The calculation of different setting calculation principles is quite different, which has a great impact on the correctness of protection actions; different protection There are differences in the principle, setting format, control word, etc. of the device manufacturer, which may also lead to missetting; For power stations, the protection setting of the generator motor needs to be set in coordination with the excitation system to ensure that the relevant limits of the excitation system precede the protection action. If the coordination is not proper, it will also lead to incorrect action of the protection

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